The jacket can be seen in several photos and was confirmed by her spokesperson, who issued a statement in an attempt to quell the rising social media backlash.

"It's a jacket," spokesperson Stephanie Grisham said.

"There was no hidden message. After today's important visit to Texas, I hope this isn't what the media is going to choose to focus on."

In a later tweet, Grisham added, "Today's visit w the children in Texas impacted @flotus greatly. If media would spend their time & energy on her actions & efforts to help kids - rather than speculate & focus on her wardrobe - we could get so much accomplished on behalf of children. #SheCares #ItsJustAJacket.

She changed into a pale yellow jacket before the plane landed in McAllen, Texas, for a visit to the Upbring New Hope Children's Center, which houses 55 migrant children.

The first lady wore the same Zara jacket even after media curiosity erupted over her fashion choice. She was wearing it as she got off the plane after landing at Andrews Air Force Base on Thursday.

This latest controversy comes as the Trump administration continues to see massive protests against its practice of detaining immigrants and separating families at the border. On Wednesday, President Donald Trump signed an executive order to keep families together at the border. However, it's been criticised for doing little for families that have already been separated.